Keywords: Burning too much methane worsens, greenhouse effect
Information: “Some steps have already been taken.” “Another strategy is to burn as much methane as possible. This adds C02 to the air, but since methane traps twenty times as much heat as C02, the net result is worthwhile.”
Answer: Đây là 1 chiến lược (strategy) = “steps”, chứ không phải là làm cho tình hình tệ hơn >< “worsens”